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Microlepidogaster discus, a new species of Hypoptopomatinae (Siluriformes: Loricariidae) from the rio Jequitinhonha basin, southeastern Brazil



A new Hypoptopomatinae is described from the upper rio Jequitinhonha basin. The new species is distinguished from all congeners by having the ventral laminar expansions of cleithrum and coracoid bearing only 1–30 odontodes, restricted to the area near the pectoral-fin insertion; the anterior plates of mid-ventral lateral series reduced, not ventrally elongated, the first or the second markedly round; pectoral-fin unbranched ray distinctly divided distally, with 7–15 ossified segments, reaching almost half of its length; and accessory process on first epibranchial present. Microlepidogaster discus is further distinguished from its congeners by several other osteological features. The problems concerning the taxonomy of Microlepidogaster, as well as the pattern of distribution of the genus, are discussed.


Biodiversity, Brazilian crystalline shield, Cascudinhos, Neotropical, taxonomy, Teleostei

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Andrade, F.R. (2010) Estado atual do conhecimento sobre a fauna de peixes da bacia do Jequitinhonha. MG Biota, 2, 23–35.

Bizerril, C.R.S.F. & Lima, N.R.W. (2005) Ictiofauna do curso inferior do rio Jequitinhonha (BA/MG) Brasil. Acta Biologica Leopondensia, 27 (3), 169–173.

Boulenger, G.A. (1891) An account of the siluroid fishes obtained by Dr. H. von Ihering and Herr Sebastian Wolff in the Province Rio Grande do Sul, Brazil. Proceedings of the Zoological Society of London, 1891, 231–235.

Buckup, P.A. (1981) Microlepidogaster taimensis sp. n., novo Hypoptopomatinae da Estação Ecológica do Taim, Rio Grande do Sul, Brasil (Ostariophysi, Loricariidae). Iheringia, 10, 19–31.

Calegari, B.B. & Reis, R.E. (2010) A new species of Microlepidogaster (Siluriformes: Loricariidae: Hypoptopomatinae) from the upper rio Paraná basin, Brazil. Neotropical Ichthyology, 8 (3), 625–630.

Cope, E.D. (1871) [Professor Cope demonstrated some anatomical points of importance in the classification of some of the siluroids of the Amazon...]. Proceedings of the Academy of Natural Sciences of Philadelphia, 1871, 112–113.

Eigenmann, C.H. & Eigenmann, R.S. (1889) Preliminary notes on South American Nematognathi, II. Proceedings of the California Academy of Sciences, 2, 28–56.

Garavello, J.C., Britski, H.A. & Schaefer, S.A. (1998) Systematics of the genus Otothyris Myers 1927, with comments on geographic distribution (Siluriformes: Loricariidae: Hypoptopomatinae). American Museum Novitates, 3222, 1–19.

Godinho, H.P., Godinho, A.L. & Vono, V. (1999) Peixes da bacia do rio Jequitinhonha. In: Lowe-McConnel, R.H. (Eds.), Estudos ecológicos de comunidades de peixes tropicais. EDUSP, FBCN, São Paulo, pp. 414–423.

Gosline, W.A. (1945) Catálogo dos nematognathos de água-doce da America do Sul e Central. Boletim do Museu Nacional, nova série, 33, 1–138.

Ihering, R. von (1907) Diversas especies novas de peixes nemathognathas do Brazil. Notas preliminares do Museu Paulista, 1 (1), 13–39.

Ihering, R. von (1928) Uma nova especie de Otocinclus (Pisces. Nematognatha) "cascudinho" de S. Paulo. Boletim Biologico, 11 (42), 1–3.

Lehmann, P.A., Braun, B.K., Pereira, E.H.L. & Reis, R.E. (2013) A New Species of the Hypoptopomatinae Catfish Parotocinclus (Siluriformes: Loricariidae), from the Headwaters of the Rio Jequitinhonha, Brazil. Copeia, 3, 435–440.

Lima, F.C.T. & Ribeiro, A.C. (2011) Continental-scale tectonic controls of biogeography and ecology. In: Albert, J.S. & Reis, R.E. (Eds.), Historical Biogeography of Neotropical Freshwater Fishes, University of California Press, Berkeley, pp. 145–164.

Martins, F.O., Britski, H.A. & Langeani, F. (2014) Systematics of Pseudotothyris (Hypoptopomatinae: Loricariidae). Zoological Journal of the Linnean Society, 170, 822–874.

Martins, F.O., Calegari, B.B. & Langeani, F. (2013) Microlepdogaster arachas, a new species of the hypoptopomatinae catfish (Siluriformes: Loricariidae) from the upper rio Paraná basin, Brazil. Zootaxa, 3608 (5), 379–388.

Martins, F.O. & Langeani, F. (2011b) Microlepidogaster dimorpha, a new species of Hypoptopomatinae (Siluriformes: Loricariidae) from the upper rio Paraná system. Neotropical Ichthyology, 9 (1), 79–86.

Martins, F.O. & Langeani, F. (2011a) Rhinolekos, a new genus with three new species of Hypoptopomatinae (Siluriformes: Loricariidae) from upper rio Paraná. Neotropical Ichthyology, 9 (1), 65–78.

Miranda Ribeiro, A. (1911) Fauna Brasiliense. Peixes. Eleutherobranchios Aspirophoros. Arquivos do Museu Nacional do Rio de Janeiro, 16, 1–504.

Miranda Ribeiro, A. (1918) Tres generos e dezesete especies novas de peixes brasileiros. Revista do Museu Paulista, 10, 629–646.

Regan, C.T. (1904) A monograph of the fishes of the family Loricariidae. Transactions of the Zoological Society of London, 17 (3), 191–350.

Regan, C.T. (1912) Descriptions of new fishes of the family Loricariidae in the British Museum Collection. Proceedings of the Zoological Society of London, 1912, 666–670.

Reis, R.E. & Schaefer, S.A. (1998) New Cascudinhos from Southern Brazil: Systematics, Endemism, and Relationships (Siluriformes, Loricariidae, Hypoptopomatinae). American Museum Novitates, 3254, 1–25.

Ribeiro, A.C. (2006) Tectonic history and the biogeography of the freshwater fishes from the coastal drainages of eastern Brazil: an example of faunal evolution associated with a divergent continental margin. Neotropical Ichthyological, 4 (2), 225–246.

Saadi, A. (1995) A geomorfologia da serra do espinhaço em Minas Gerais e suas margens. Geonomos, 3 (1), 41–63.

Schaefer, S.A. (1997) The Neotropical cascudinhos: Systematics and biogeography of the Otocinclus catfishes (Siluriformes: Loricariidae). Proceedings of the Academy of Natural Sciences of Philadelphia, 148, 1–120.

Schaefer, S.A. (1998) Conflict and Resolution: Impact of New Taxa on Phylogenetic Studies of the Neotropical Cascudinhos (Siluroidei: Loricariidae). In: Malabarba, L.R., Reis, R.E., Vari, R.P., Lucena, Z.M.S. & Lucena, C.A.S. (Eds.), Phylogeny and Classification of Neotropical Fishes. Edipucrs, Porto Alegre, pp. 375–400.

Taylor, W.R. & Van Dike, G.C. (1985) Revised procedures for staining and clearing small fishes and other vertebrates for bone and cartilage study. Cybium, 9 (2), 107–119.


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